Fastening pulling machines



Dec. 20, 1955 L. E. STEIMEN 2,727,259

FASTENING PULLING MACHINES Filed Aug. 26, 1955 2 Sheets-Sheet 1 Inventor Lawrence E Szez'men his Attorney 2 Sheets-Sheet 2 Dec. 20, 1955 L. E. STEIMEN FASTENING PULLING MACHINES Filed Aug. 26, 1953 ii -i F Inventor [awrence E Szez'men By his Attorney operating point. 7 is 'driven from a shaft by a one-revolution clutch, the disk being normally held stationary until the clutch is-tripped United States Patent FASTENING PULLING MACHINES LawrenceE. Steimen, Topsfield, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. L, a cor- -poration of New Jersey Application August 26, 1953, Serial No.37 6,618

3 Claims. (CI; 12-16) "This invention relates tofastening pulling machines,

and is herein illustrated as embodied in a machine for pulling insole tacks from shoes.

" In fastening pulling machines of the type referred to,

as heretofore constructed, difiiculties have been experienced in connection with readily and quickly'locating 'fastenings in a shoe relatively to the pulling tool, in pulling deeply embedded fastenings, and indisposing-of pulled fastenings in such manner as to prevent "likelihood of injury to the operator.

In view of this it is an objectof the inventiontoprovide an improved fastening pulling machine especially adapted to facilitate, presentation of the work to apulling tool,

together with novel mechanism for actuatingthe tool and for controlling the relative positions. of the tool and the work during the pulling operation.

To this end, andas shown, the-invention provides a rotary disk in which is mounted, forradialmovement, a tool holder carrying a fastening. pulling tool,-there being a cam engaging the holder for controlling the path of movement of the tool, and a worl -guide positioned adjacent to the path and movable into predeterminedipositions relatively to thepath for locating the work at the Preferably and" as illustrated, the disk by electrical means, operation of-which is initiated by movement of the guide in presenting the work to themachine. Asshown, there is also provided workilluminating means including'a lamp, light from which passes through an opening inthe disk when the latter-is'rstationary, to light an area of the work and'therebyindicate 'the position of the operatingpoint to which afastening is to be presented. 7

1 Theseand other features of the inventionarc disclosed inthe following specification and in the'accompanying drawings, and are. pointed out in the claims.

path to engage-andpull-a tack such" as tack 16 infa shoe 19 located inoperative position relatively to thepath of the tool by means of a-support-Zllar'id a guide 22.

The tool-14 is-irr the form tifapickhaving a grooved -erid '24fFig. 3,'for engagingtacks'to be mined and a shank 26. The shank is held in a bore 28 in a tool holder 30 by a set screw 32.

The holder 36 is in the form of a slide mounted in a radial slot 34 in a circular disk 36 mounted upon a shaft 'tively to the shank 48 in the direction of movement-rof beneath its head.

2,727,259 Patented, Deer 20,1955

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38 arranged to be rotated bya motor driven. pulley: 39.

Surrounding the disk isahousing 40 within which is located a stationary cam 42 held in position by bolts '44. The eam is. generally circular in shape butrhas aflat-portion46-and an adjacent sharply reentrantportion 48'followedby arise 50. The cam isin. positionto be engaged by a roll 52 onthe .tool holder which-is normally forced outwardly of the center of the disk by. a spring 54. This construction is such that upon-rotation of the. disk-36 the end ofthe tool moves through a circular path. determined by the engagement of the roll with thecam until the operating point is approached whereupon the spring forces the tool holder and tool outwardly with thearoll against the fiat portion 46 of the cam,=then rapidlyout- .ward with the roll in'the reentrant portion-48, after. which the tool holder and tool are retracted when "the rollrides up uponlthe rise 50.

'The endportion of the tool is inclined slightly relathe disk to facilitate engagement-of the-tool with the, tack The path of thepulling tool forwardlyoffthe operating point is enclosed by a semicircular safety guard :58 having a U-shaped cross section, the guard being. secured to the cam plate by screws "60. The. guard 58 also tunetions to direct pulled-tacks away from "the operating'point to the top "of the machine where they can be received in a receptacle, not shown.

Near the operating, point the. guard is 'flared outwafdly to form the support" 20 against which a shoelfrorn which tacks are to be removed-can be located. Location offthe 'shoe'relatively to the tool path-is further .facilitatdiby the guide 22. The guide is a U shaped. member having vertical side. walls'62- and aconnecting bottom part .64 which is normally positionediu advance of the support 'Zll'below' the'path of the tool and spaced fromfthesupport by adistance several times as greatas'the widthlof a tack head.

The'guide'forms a depending part ofone end of; a

lever'66; Fig. 1, pivoted at68 onthe head'12. The. lever "and guide are normally forcedoutwardly of the, pathtof the tool by means of a spring 7'0. positioned betweenfthe upper face 'ofthe lever and an abutment 72 in the casing.

Outward movement of the guide is limited by a setscrew 74,"on"anarm '76 onithe lever, and arranged to. engage a boss 78 onthehead.

Inward movemenvofthe ,g'uide islimite'd, by afstop 'levef ll'having arcuate' faces" 82 and 84,:1tdi'fferent levels "height'wise of the lever, arranged to act as stops to engage a setcrew 86 on the lever 66.

. Either of the faces may be positioned.inoperative re- "edon a pivot 88'about1which the'lever can betrnoved by "normally held in its upper positioniby a .springf94 ,ex-

" tendingbetween a collar' '9ti'onf the link and-jan hbutment 398 on fthe head. "I Inthis .position thetlever 80, is locatedv\/'ith the face82 inoperative relationto the. set

screw 86. Upon depression ofthetrierdle'the'. face'"84 is "brought'ihtooperative relation to" the sets crew.

*"With the construction and arrangement "of, 'parts'iilius far d'esicribed it'will be .apparent that' alasted shoe 'sli'ch as; :shoe19 can be readilypresentedfin' operative" relation te the tool path by restingy'therinsoleifi thereofiagainst the support 20 with a tack in the insole located betweenjthe =support and-the, movableguide zl By forcinggthe" shoe upwai dlyagainst the'guide utilizingthe support as afp'ivot upon rotation of the tool is pulled. The movement of the shoe into the path of the tool is arrested by the face 82 of the stop lever. However, if a tack is deeply embedded in the insole of the shoe, depression of the treadle revolution of the shaft 38.

will'res ult 'in placing face 84 in operative position with the result that the shoe in engagement with the guide 22 can be moved further inwardly to permit the tool to dig into the insole behind the tack head sufiiciently deeply to engage and pull the tack.

The shaft 38 is rotated by means of a one-revolution clutch 100, of well-known construction, having a clutch bolt 102 for effecting engagement of the pulley 39 and.

shaft 38 upon release of a clutch rod 104. The rod is normally forced to the left, Fig. 2, into clutch disengaging position by a spring 106 and is moved to the right by the plunger 108 of a solenoid 110 which is actuated at the proper time by operation of the lever 66 when the work As shown in the Wiring diagram of Fig. 4 the solenoid 110 is connected by a lead 116 to one side 118 of a power line which extends to a contact 120 of the switch 114. A lead 122 extends from the other contact 124 to contacts 126 and 128 of a relay 130. The relay has a lower armature 131 normally bridging the contact 128 and a contact 132 connected to a lead 134 extending to a coil 136 of a relay 138. The coil is connected by lead 140 to the other side 142 of the power line. A motor 141 for driving the pulley 39 is connected across the power lines 118 and 142, and is controlled by a line switch 143.

The relay 138 has a contact 144 connected by a lead 146 to lead 140 and a contact 148 connected by a lead 150 to the solenoid 110. The circuit across contacts 144 and 148 is normally open but is arranged to be closed by armature 152 when the coil 136 is energized, thus to effect operation of the solenoid 110 to initiate a single The coil 136 is connected by a lead 154 to one end of a coil 156 of the relay 130 the other end of the coil being connected to a contact 158 which can be connected to the contact 126 by operation of the upper armature 160 of the relay 130. The coil 156 is also connected by a lead 162 to one side 164 of a switch 166, Figs. 1, 3 and 4, the other side 168 of which is connected by a lead 170 to the power line 118. The circuit through the switch 166 is normally open but is arranged to be closed by operation of a cam 168 on the shaft 38, shortly after rotation of the shaft has commenced.

Thus, when the work is pressed against the guide 22, the switch 114 is closed and the circuit through lead 122, armature 131, lead 134 and coil 136 is energized causing flow of current through lead 150 and the solenoid 110 which causes the plunger 108 to trip the clutch 100 effecting one revoltuion of the shaft 38 and an operation of the pulling tool 14.

As the shaft 38 rotates the cam 168 closes the switch 166 with the result that current passes through coil 156 closing the circuit across contacts 126 and 158, and opening the circuit through coil 136. This results in opening the circuit through the solenoid 110, and the spring 106 forces the plunger 104 into clutch disengaging position, and the shaft and tool are subsequently brought to rest after a single revolution.

As the shaft nears the end of a single revolution the cam 168 releases the switch 166. If, after the switch 166 has been released, the work is still held against the work guide 22 current through the coil 156 will maintain the armature 131 in its inoperative position with the circuit through the coil 136 open with the result that a second operation of the clutch is prevented. However,

when.the work is moved away from the work guide 22 the switch 114 is released thus opening the circuit through 4 the coil 156 permitting the armatures 131 and to assume their original positions.

As shown in Fig. 3, the operating point of the machine lies along the path of the tool during its radial movement under control of the spring 54 and the cam 42, and located slightly in advance of the nose portion 20 of the guard. In presenting a shoe to the machine the tacks therein should be successively located with their heads extending into the path of the tool at that point. This is facilitated'by spot illumination of the insole of a shoe presented to the guide 22 in such manner that the spot indicates the position into which a tack should be moved properly to locate it along the path of the tool. To this end, the head 12, Fig. 1, carries an electric lamp 170, light from which is directed throughan opening 172 in the head and an opening 174 in the disk 36 at such times as the disk is stationary. The openings are in alinement with the operating point and serve to direct a spot. of light upon the insole of a shoe initially presented to the guide 22.

In the operation of the machine a shoe is presented bottom up to the guard 20 and guide 22 and is moved along the latter until a tack to be pulled is located within the spot of light appearing upon the insole. Pressure then applied upwardly against the guide actuates the switch 114 resulting in a single revolution of the tool to effect pulling of the tack.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

l. A fastening pulling machine comprising a rotary disk, a tool holder slidably mounted radially of the disk, a fastening pulling tool mounted on the holder, resilient means normally forcing the tool outwardly of the axis of the disk, a circular cam engaging the holder to limit outward movement of the tool thus to control the path of movement of the tool, a work guide adjacent to the tool path comprising a pivoted lever, and stops for limiting movement of the lever in a direction toward the path.

2. A fastening pulling machine comprising a rotary disk, a tool holder slidably mounted radially of the disk, a fastening pulling tool mounted on the holder, resilient means normally forcing the tool outwardly of the axis of the disk, a circular cam engaging the holder to limit outward movement of the tool thus to control the path of movement of the tool, a work guide adjacent to the tool path comprising a pivoted lever, stops for limiting movement of the lever in a direction toward the path, and means responsive to movement of the lever for initiating rotation of the disk.

3. A fastening pulling machine comprising a rotary disk, a tool holder slidably mounted radially of the disk, a fastening pulling tool mounted on the holder, resilient means normally forcing the tool outwardly of the axis of the disk, a circular cam engaging the holder to limit outward movement of the tool thus to control the path of movement of the tool, means normally operative for retaining the disk in stationary position with the tool about away from the operating point, an opening in the disk, and a lamp for illuminating the operating point when the disk is stationary.

References Cited inthe file of this patent UNITED STATES PATENTS 448,023 Gordon Mar. 10, 1891 520,775 Fowler et al. June 5, 1894 968,755 Bppler Aug. 30, 1910 2,183,695 Robinson Dec. 19, 1930 2,518,960 Tellison et al. Aug. 15, 1950 

